[논문]공급업체 수가 주문 생산 제조 기업의 재고 관리에 미치는 영향 분석

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공급업체 수가 주문 생산 제조 기업의 재고 관리에 미치는 영향 분석
The Impacts of the Number of Suppliers on Inventory Management in a Make-to-order Manufacturer 원문보기

산업공학 = IE Interfaces, v.23 no.4, 2010년, pp.327 - 336

Abstract ▼ AI-Helper

We consider a supply chain consisting of a make-to-order manufacturer and N component suppliers and study the impacts of the number of suppliers on component inventory management. The manufacturer has full information and continuously observes the state of both component inventory level and customer backorders. Based on this information, the manufacturer determines whether or not to place a component purchasing order to a supplier among N suppliers even though some orders are in process by other suppliers. The goal of this paper is to numerically identify the manufacturer's purchasing policy which minimizes the total supply chain cost and the best choice of N. Our model contributes to the current literature in that the problem of simultaneously considering multiple outstanding orders and incorporating order setup cost into the model has not been covered yet. From numerical experiment, we investigate how much the policy with N suppliers can contribute to reducing the supply cost compared to the policy with a single supplier.

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가설 설정

In the context of already-published work in this area, the contribution of this paper can be established in the following two essential aspects. First, compared to MTOPI models and classical continuous review inventory models with lost sales, we study the issue of inventory management with multiple outstanding orders rather than at most single outstanding order. Under the mechanism of multiple outstanding orders, there exist multiple reorder points which depend on both the inventory level and the customer backorder level.
Theorem 1 : For the average cost MDP problem defined in (4) with infinite state space can be transformed into new one with finite state space.
Theorem 2 : When the average cost MDP problem defined in (4) has a finite state space, there exists a stationary policy that is average cost optimal.

제안 방법

The goal of this paper is to identify the manufacturer’s purchasing policy which minimizes the supply chain cost (consisting of customer order rejection, customer backorder, order setup, and component inventory holding), to find the best choice of , and to examine the beneficial effects of having N suppliers rather than a single supplier.
The methodology developed here provides a simple basis for estimating the impacts of utilizing multiple suppliers rather than a single supplier in purchasing components, based on test examples. However, this approach limits the applicability of the numerical results obtained in this paper.
We investigated the optimal purchasing policy for asupply chain consisting of a MTO manufacturer and C component suppliers. We analyzed the impact of the number of suppliers on the structure of the optimal policy through a numerical experiment. Specifically, we showed the existence of the optimal policy and the optimal average cost, and present the optimal solution procedure that computes these optimal performances.

이론/모형

The model presented in this paper has the operating feature similar to a make-to-order inventory-production (MTOPI) system in the literature. MTOPI system is concerned with a supply chain that is made up of a production facility and a raw material supplier.
To provide insights into the effective inventory control, we model the problem using an Markov Decision Process (MDP). We assume that customer order process follows a Poisson process, and both customized manufacturing and component lead time processes have an exponential distribution.

후속연구

However, this approach limits the applicability of the numerical results obtained in this paper. To provide managerial insights for component suppliers and end item manufacturer, a more elaborate computational study is needed through real manufacturer data, which will be a viable direction of further research.

참고문헌 (14)

Archibald, B. C. (1981), Continuous review (s, S) policies with lost sales, Management Science, 27, 1171-1177.

상세보기
Beckmann, M. and Srinivasan, S. K. (1987), An (s, S) inventory system with Poisson demands and exponential lead time, OR Spectrum, 9, 213-217.

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Berman, O. and Kim, E. (1999), Stochastic models for inventory management at service facilities, Communications in Statistics- Stochastic Model, 15, 695-718.

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Buchanan, D. J. and Love, R. F. (1985), A (Q, R) inventory model with lost sales and Erlang-distributed lead times, Naval Research Logistics, 32, 605-611.

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Carr, S. and Duenyas, I. (2000), Optimal Admission Control and Sequencing in a Make-To-Stock/Make-To-Order purchasing System, Operations Research, 48, 709-720.

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He, Q. and Jewkes, E. M. (2000), Performance measure of a make-to-order inventory-purchasing system, IIE Transactions, 32, 409-419.

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He, Q., Jewkes, E. M., and Buzacott, J. (2002), Optimal and near-optimal inventory control policies for a make-to-order inventory-purchasing system, European Journal of Operational Research, 141, 113-132.

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Kim, E. (2005), Optimal inventory production policy for a queueing system with finite waiting room capacity, European Journal of Operational Research, 161, 256-274.

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Mohebbi, E. and Posner, M. J. (1998), A continuous-review inventory system with lost sales and variable lead time, Naval Research Logistics, 45, 259-278.

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Morton, T. E. (1971), The near-myopic nature of the lagged-proportional-cost inventory problem with lost sales, Operations Research, 19, 1708-1716.

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Nahmias, S. (1979), Simple approximations for a variety of dynamic lead time lost-sales inventory models, Operations Research, 27, 904-924.

상세보기
Puterman, M. (2005), Markov Decision Processes, John Wiley and Sons.
Hill, R. M. and Johansen, S. G. (2006), Optimal and near-optimal policies for lost sales inventory models with at most one replenishment order outstanding, European Journal of Operational Research, 169, 111-132.

상세보기
Van Donselaar, K., de Kok, T., and Rutten, W. (1996), Two replenishment strategies for the lost sales inventory model : A comparison, International Journal of Production Economics, 46, 285-295.

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공급업체 수가 주문 생산 제조 기업의 재고 관리에 미치는 영향 분석
The Impacts of the Number of Suppliers on Inventory Management in a Make-to-order Manufacturer 원문보기

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공급업체 수가 주문 생산 제조 기업의 재고 관리에 미치는 영향 분석 The Impacts of the Number of Suppliers on Inventory Management in a Make-to-order Manufacturer 원문보기

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공급업체 수가 주문 생산 제조 기업의 재고 관리에 미치는 영향 분석
The Impacts of the Number of Suppliers on Inventory Management in a Make-to-order Manufacturer 원문보기

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